The amazing small and bright Neopixel. the O in neopixel is a close-up of an RGB LED.
Brown Micro Potentiometer Knob - 4 pack
Angled shot of four brown plastic micro knobs.
Adafruit PCF8574 I2C GPIO Expander Breakout
Anodized Aluminum Machined Knob - Silver - 20mm Diameter
Angled shot of a black aluminum knob. A black triangle on top of the knob points at 7:00.